plpsm - plpgpsm: small pl_func fix (porint onfo about tbl expr)

Log Message:
-----------
small pl_func fix (porint onfo about tbl expr)

Modified Files:
--------------
plpgpsm/src:
gram.y (r1.38 -> r1.39)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/gram.y.diff?r1=1.38&r2=1.39)
pl_funcs.c (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/pl_funcs.c.diff?r1=1.6&r2=1.7)
plpgpsm.h (r1.29 -> r1.30)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/plpgpsm.h.diff?r1=1.29&r2=1.30)